Method for increasing construction space under invert trestle of single track railway tunnel

Abstract

A method for increasing the construction space under the invert trestle of a single track railway tunnel includes: an inverted arch short lateral wall form board is provided with a horizontal reinforcing bottom support rod at the middle-section concrete I at the bottom of an inverted arch, and the inverted arch short lateral wall form board is provided with a transverse reinforcing top support rod at the connection of the middle-section concrete I at the bottom of the inverted arch and inverted arch short lateral wall concrete II; an invert trestle height increasing shoe is disposed between a first inverted arch filling actual top surface and a designed inverted arch filling top surface, and the invert trestle height increasing shoe is welded with a simple steel trestle along a slope direction; one end of an inverted arch short lateral wall reinforcing support is welded to the bottom of the simple steel trestle, the other end of the inverted arch short lateral wall reinforcing support is disposed in a dug inverted arch ground, and slide wheels are disposed at the contact positions of the inverted arch short lateral wall reinforcing support and the ground so as to facilitate sliding; an inverted arch short lateral wall combined forming steel die reinforcing device and the height increasing shoe jointly form an inverted arch short lateral wall combined reinforcing device and height increasing shoe system.

Description

technical field [0001] The invention relates to a technique for increasing construction space under an inverted arch trestle of a single-track railway tunnel, in particular to a technique for increasing the construction space of an inverted trestle under the trestle by adding heightened "boots" to the fulcrums at both ends of the inverted arch trestle of a single-track railway tunnel. Background technique [0002] Tunnel inverted arch refers to the support under the tunnel pavement, and tunnel low side wall refers to the concrete foundation of tunnel arch wall. The construction of inverted arch and low side wall is usually poured first in the tunnel lining. Supported on the arch, positioned on the concrete of the low side wall, so as to pour the concrete of the tunnel arch wall. [0003] Since the railway tunnel construction regulations not only have strict requirements on the safety distance from the inverted arch to the tunnel face, but also the tunnel inverted arch and th...

AI Technical Summary

Problems solved by technology

[0004] In order to ensure the integrity and anti-seepage of the cable channel of the single-track railway tunnel, as well as the forward movement of the second lining platform and the safety of vehicles, during the construction of tunnel inverted arch filling, the filling height can only be poured at the bottom of the channel. After the second lining of the tunnel is poured, the rest of the filling concrete is poured at the same time when pouring the ditch cables. Since the first inverted arch pouring is relatively low, the space for the inverted arch construction after the trestle is placed is too small, and the steel bars are tied and The reinforcement of the low side wall of the inverted arch cannot be implemented in the narrow space under the trestle bridge, which seriously affects the construction of the inverted arch and makes it difficult for the scientific and effective organization of the construction process of the single-track tunnel, resulting in long preparation time for construction work, low efficiency, and high cost. advanced questions

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